Antibodies are produced by
A. the red bone marrow.
B. cytotoxic T cells stimulated by helper T cells.
C. B cells that differentiate to form plasma cells.
D. natural killer cells as they lyse cancer cells.
E. helper T cells stimulated by various cytokines.
Answer: C
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The metabolic process called ____________________ (a two-word answer) provides the most ATP molecules for use by muscle fibers contracting over a long period of time
Fill in the blank(s) with correct word
Pulsate secretion of growth hormone is descriptive of or occurs during
A. slow-wave sleep. B. paradoxical sleep. C. both slow-wave sleep and paradoxical sleep. D. neither slow-wave sleep nor paradoxical sleep.
What explains the dramatic acceleration in lengthwise bone growth at puberty?
A. Increased activity of osteoclasts occurs in response to parathyroid hormone stimulation. B. Increased rate of calcium deposition occurs due to high blood calcium levels. C. Increased physical activity causes lengthwise growth in response to bone stress. D. Increased secretion of sex hormones promotes epiphyseal plate growth. E. Increased absorption of dietary vitamins and minerals strengthens the matrix.
Chemotaxis:
A. refers to the chemical attraction of neutrophils to a site of inflammation. B. is important only for innate immune responses. C. is important only for adaptive immune responses. D. refers to the engulfing of microbes and foreign molecules by macrophages. E. refers to dilation of blood vessels by chemicals released by damaged tissue cells.